The following debdiff contains the upstream patch to be backported.

The qemu code itself is untouched, but the upstream patch has been
pruned to remove modifications to the testsuite that did not apply on
this version.

The reproducer usually hit the bug in between 30 and 45 seconds. But
sometimes it does not reproduce the problem as seen here :

root@qemu-bug:~# while true;do cp /tmp/disk.qcow2.ref /tmp/disk.qcow2;time 
./qmp-hang-reproducer.py;rm -f /tmp/disk.qcow2;done
qemu pid: 476254
QMP timeout, exiting

real    0m22.241s
user    0m4.037s
sys     0m2.380s
qemu pid: 476264
QMP timeout, exiting

real    0m42.807s
user    0m13.177s
sys     0m16.983s
qemu pid: 476274
^CTraceback (most recent call last):
...
KeyboardInterrupt

real    2m0.619s
user    1m0.317s
sys     0m38.969s

It may be required to run it multiple times to reproduce the problem

** Patch added: "qemu_6.2+dfsg-2ubuntu6.25.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/2091013/+attachment/5842111/+files/qemu_6.2+dfsg-2ubuntu6.25.debdiff

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https://bugs.launchpad.net/bugs/2091013

Title:
  Jammy : Please backport upstream fix to qmp timeouts

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